Just about to replace our existing NW6.0 SP5 BM36 SP2 server with new
hardware running NW6.5 SP5 BM38 SP5.

New server, as recommended by Cat and Craig, has been running in parallel
with the old one during testing.

About to take the plunge and add the private IP address of the old server as
a secondary IP address to the new box. When adding the secondary IP address
to the new server in INETCFG>BINDINGS>TCP/IP PRIVATE ADDRESS>SECONDARY IP
ADDRESS SUPPORT> SECONDARY IP ADDRESS LIST ON THIS INTERFACE>INSERT IP
ADDRESS you have the option when adding the IP address to make it ARPABLE
(the default is YES). Should this address be ARPABLE?

Also same question but when adding our existing secondary mailgate public IP
address used to static NAT to our internal Groupwise7 SMTP server should
this address be ARPABLE?

Thanks in advance.